You're and your have 2 different meanings.

You're stands for You are. Used to describe the person you are talking to.
Your is used to describe a person who you are talking to possession/belonging.
You are my brother. We must fight together.
Your brother is a naughty boy.
Your grammar is horrible.
(Grammar mistakes that are made alot these days.)
by BertBerry June 25, 2016
Get the Grammar mistakes that are made alot these days. mug.